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Almanac > Constellations

Hydra

Hydra is one of the 88 recognized constellations. It is best seen in April between latitudes +54° and -83°.
 

 



Hydra

 
 
Fact Sheet

Genitive

  Hydrae

Abbreviation

  Hya

Brightness

  5.45

Location

  10 h (Right Ascension)

  -20° (Declination)

Area

  1303 square degrees

Number of Visible Stars

  71

Notable Stars

  Alphard

Alpha Star

  Alphard

Brightest Star

  HR 4458 (31.1 ly)

Best Seen

  +54° and -83° (Best Latitudes)

  April (Best Month)

 
Description

Overview:
The constellation Hydra (pronouced hi' druh) is the 1st largest constellation in the night sky with an area of 1303 square degrees. The name of this constellation means Water Serpent.

Location:
Hydra is located at Right Ascension 10 h and Declination -20°. Hydra is best seen between latitudes +54° and -83° in the April. Hydra is adjacent to the following constellations: Antlia, Cancer, Canis Minor, Centaurus, Corvus, Crater, Leo, Libra, Lupus, Monoceros, Puppis, Pyxis, Sextans, Virgo.

Stars:
Hydra contains within its borders approximately 71 visible stars. The principal star of Hydra is Alphard. The brightest star is HR 4458 (31.1 ly). Hydra also contains within its boundries the following noteworthy stars: Alphard.

Visual Magnitude:
Hydra is the 19th brightest constellation with a visual magnitude of 5.45.